/*
* Hibernate, Relational Persistence for Idiomatic Java
*
* Copyright (c) 2010, Red Hat Inc. or third-party contributors as
* indicated by the @author tags or express copyright attribution
* statements applied by the authors. All third-party contributions are
* distributed under license by Red Hat Inc.
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.hibernate.id.factory;
import java.util.Properties;
import java.io.Serializable;
import java.util.concurrent.ConcurrentHashMap;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.hibernate.id.IdentifierGenerator;
import org.hibernate.id.UUIDGenerator;
import org.hibernate.id.UUIDHexGenerator;
import org.hibernate.id.TableHiLoGenerator;
import org.hibernate.id.Assigned;
import org.hibernate.id.IdentityGenerator;
import org.hibernate.id.SelectGenerator;
import org.hibernate.id.SequenceGenerator;
import org.hibernate.id.SequenceHiLoGenerator;
import org.hibernate.id.IncrementGenerator;
import org.hibernate.id.ForeignGenerator;
import org.hibernate.id.GUIDGenerator;
import org.hibernate.id.SequenceIdentityGenerator;
import org.hibernate.id.Configurable;
import org.hibernate.id.enhanced.SequenceStyleGenerator;
import org.hibernate.id.enhanced.TableGenerator;
import org.hibernate.type.Type;
import org.hibernate.util.ReflectHelper;
import org.hibernate.dialect.Dialect;
import org.hibernate.MappingException;
/**
* Basic <tt>templated</tt> support for {@link IdentifierGeneratorFactory} implementations.
*
* @author Steve Ebersole
*/
public class DefaultIdentifierGeneratorFactory implements IdentifierGeneratorFactory, Serializable {
private static final Logger log = LoggerFactory.getLogger( DefaultIdentifierGeneratorFactory.class );
private transient Dialect dialect;
private ConcurrentHashMap<String, Class> generatorStrategyToClassNameMap = new ConcurrentHashMap<String, Class>();
/**
* Constructs a new DefaultIdentifierGeneratorFactory.
*/
public DefaultIdentifierGeneratorFactory() {
register( "uuid2", UUIDGenerator.class );
register( "guid", GUIDGenerator.class ); // can be done with UUIDGenerator + strategy
register( "uuid", UUIDHexGenerator.class ); // "deprecated" for new use
register( "uuid.hex", UUIDHexGenerator.class ); // uuid.hex is deprecated
register( "hilo", TableHiLoGenerator.class );
register( "assigned", Assigned.class );
register( "identity", IdentityGenerator.class );
register( "select", SelectGenerator.class );
register( "sequence", SequenceGenerator.class );
register( "seqhilo", SequenceHiLoGenerator.class );
register( "increment", IncrementGenerator.class );
register( "foreign", ForeignGenerator.class );
register( "sequence-identity", SequenceIdentityGenerator.class );
register( "enhanced-sequence", SequenceStyleGenerator.class );
register( "enhanced-table", TableGenerator.class );
}
/**
* {@inheritDoc}
*/
public void setDialect(Dialect dialect) {
log.debug( "Setting dialect [" + dialect + "]" );
this.dialect = dialect;
}
public void register(String strategy, Class generatorClass) {
String msg = "Registering IdentifierGenerator strategy [" + strategy + "] -> [" + generatorClass + "]";
Object old = generatorStrategyToClassNameMap.put( strategy, generatorClass );
if ( old != null ) {
msg += ", overriding [" + old + "]";
}
log.debug( msg );
}
/**
* {@inheritDoc}
*/
public IdentifierGenerator createIdentifierGenerator(String strategy, Type type, Properties config) {
try {
Class clazz = getIdentifierGeneratorClass( strategy );
IdentifierGenerator idgen = ( IdentifierGenerator ) clazz.newInstance();
if ( idgen instanceof Configurable ) {
( ( Configurable ) idgen ).configure( type, config, dialect );
}
return idgen;
}
catch ( Exception e ) {
String msg = "Could not instantiate id generator [entity-name="
+ config.get( IdentifierGenerator.ENTITY_NAME ) + "]";
throw new MappingException( msg, e );
}
}
/**
* {@inheritDoc}
*/
public Class getIdentifierGeneratorClass(String strategy) {
if ( "native".equals( strategy ) ) {
return dialect.getNativeIdentifierGeneratorClass();
}
Class generatorClass = generatorStrategyToClassNameMap.get( strategy );
try {
if ( generatorClass == null ) {
generatorClass = ReflectHelper.classForName( strategy );
}
}
catch ( ClassNotFoundException e ) {
throw new MappingException( "Could not interpret id generator strategy [" + strategy + "]" );
}
return generatorClass;
}
}